package com.tanhua.dubbo.server.service;

import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpRequest;
import cn.hutool.http.HttpResponse;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.tanhua.dubbo.server.config.HuanXinConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @Author CY
 * @Description //
 * @Date 19:00
 * @Param
 * @return
 * @Version 1.0
 */
@Service
@Slf4j
public class TokenService {
    @Autowired
    public RedisTemplate<String ,String> redisTemplate;
    private static final String REDIS_KEY = "HX_TOKEN";
    @Autowired
    private HuanXinConfig huanXinConfig;
    //获取token，先从Redis中获取，如果没有，再去环信接口中获取再从
    public String getToken(){
        String token = this.redisTemplate.opsForValue().get(REDIS_KEY);
        if(StrUtil.isNotEmpty(token)){
            return token;
        }
        //访问环信接口获取token
        return this.refreshToken();
    }
    //刷新token,请求环信接口，将token存储到Redis中
    public   String refreshToken(){
        String targeUrl=this.huanXinConfig.getUrl()+
                this.huanXinConfig.getOrgName()+"/"+
                this.huanXinConfig.getAppName()+"/token";
        Map<String,Object> param = new HashMap<>();
        param.put("grant_type", "client_credentials");
        param.put("client_id", this.huanXinConfig.getClientId());
        param.put("client_secret", this.huanXinConfig.getClientSecret());

        HttpResponse response = HttpRequest.post(targeUrl)
                .body(JSONUtil.toJsonStr(param))
                .timeout(20000)//请求的超时时间
                .execute();
        if(!response.isOk()){
            log.error("刷新token失败~");
            return null;
        }
        String jsonBody = response.body();
        JSONObject jsonObject = JSONUtil.parseObj(jsonBody);
        String token = jsonObject.getStr("access_token");
        if(StrUtil.isNotEmpty(token)){
            //将token数据存到Redis中， 缓存时间由expires_in决定
            //提前1小时失效
            Long timeout=jsonObject.getLong("expires_in")-3600;
            this.redisTemplate.opsForValue().set(REDIS_KEY,token,timeout,TimeUnit.SECONDS);

            return token;
        }
        return null;
    }
}
